I kept bees for years, and once found some honey that was an odd shade of mauve. I discovered that a university was doing some research on moths, and the team was using mauve-dyed sugar solution to attract them at night.
It was dyed to prevent people from eating it apparently. They spread the gloopy stuff on large trays, and left it there. Moths came at night, but during daytime my bees were having a fine old time with it. It went on for weeks and the dye passed into the honey. It tasted good, but nobody wanted it, so I ditched all twenty pounds of it.